TM 9-2815-250-24&P3-5.CYLINDER HEADS REPAIR (continued).4.Remove two guides (1) from two recesses incrankcase (11).5.Remove two O-rings (10) from two grooves ineach of two guides (1). Discard O-rings.NOTE·There are two valves, intake andexhaust, in each of two cylinderheads. Follow steps 6 and 7 foreach of them.·Part numbers are different for theintake and exhaust valves, butthe valves are removed the sameway. This procedure describesthe removal of an exhaust valve.6.Using a valve spring lifter, compress valvespring (14) and remove two valve spring retainerlocks (12) from valve spring (14) and exhaustvalve (16).7.Remove valve spring retainer washer (13), valvespring (14), and base spring washer(15) fromexhaust valve (16). Remove exhaust valve (16)from bottom of cylinder head (6).b.CLEANING AND INSPECTION1.Inspect four push rods for bends or wear on foursockets at ends of push rods. Replace any pushrods if bent or if sockets are worn.2. Clean valves and valve seats with carbon-removing compound.WARNINGDrycleaning solvent P-D-680 is toxicand flammable. Always wearprotective goggles and gloves anduse only in a well-ventilated area.Avoid contact with skin, eyes, andclothes, and DO NOT breathe vapors.DO NOT use near open flame orexcessive heat.3. Using drycleaning solvent and rag, clean valves,springs, washers, locks, and valve seat.3-16